- (dtucker) [configure.ac openbsd-compat/bsd-closefrom.c] Use F_CLOSEM fcntl

for closefrom() on AIX.  Pointed out by William Ahern.

ChangeLog

@@ -1,6 +1,8 @@
 20060817
  - (dtucker) [openbsd-compat/fake-rfc2553.c openbsd-compat/setproctitle.c]
    Include stdlib.h for malloc and friends.
+ - (dtucker) [configure.ac openbsd-compat/bsd-closefrom.c] Use F_CLOSEM fcntl
+   for closefrom() on AIX.  Pointed out by William Ahern.
 
 20060816
  - (djm) [audit-bsm.c] Sprinkle in some headers
@@ -5214,4 +5216,4 @@
    - (djm) Trim deprecated options from INSTALL. Mention UsePAM
    - (djm) Fix quote handling in sftp; Patch from admorten AT umich.edu
 
-$Id: ChangeLog,v 1.4480 2006/08/17 08:55:27 dtucker Exp $
+$Id: ChangeLog,v 1.4481 2006/08/17 09:35:49 dtucker Exp $

configure.ac

@@ -1,4 +1,4 @@
-# $Id: configure.ac,v 1.348 2006/08/04 09:44:23 dtucker Exp $
+# $Id: configure.ac,v 1.349 2006/08/17 09:35:49 dtucker Exp $
 #
 # Copyright (c) 1999-2004 Damien Miller
 #
@@ -15,7 +15,7 @@
 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 AC_INIT(OpenSSH, Portable, openssh-unix-dev@mindrot.org)
-AC_REVISION($Revision: 1.348 $)
+AC_REVISION($Revision: 1.349 $)
 AC_CONFIG_SRCDIR([ssh.c])
 
 AC_CONFIG_HEADER(config.h)
@@ -180,6 +180,12 @@ case "$host" in
 		[#include <usersec.h>]
 	)
 	AC_CHECK_FUNCS(setauthdb)
+	AC_CHECK_DECL(F_CLOSEM,
+	    AC_DEFINE(USE_FCNTL_CLOSEM, 1, [Use F_CLOSEM fcntl for closefrom]),
+	    [],
+	    [ #include <limits.h>
+	      #include <fcntl.h> ]
+	)
 	check_for_aix_broken_getaddrinfo=1
 	AC_DEFINE(BROKEN_REALPATH, 1, [Define if you have a broken realpath.])
 	AC_DEFINE(SETEUID_BREAKS_SETUID, 1,

openbsd-compat/bsd-closefrom.c

@@ -22,6 +22,9 @@
 #include <sys/param.h>
 #include <unistd.h>
 #include <stdio.h>
+#ifdef HAVE_FCNTL_H
+# include <fcntl.h>
+#endif
 #include <limits.h>
 #include <stdlib.h>
 #include <stddef.h>
@@ -76,6 +79,10 @@ closefrom(int lowfd)
 	}
 	(void) closedir(dirp);
     } else
+#elif defined(USE_FCNTL_CLOSEM)
+    if (fcntl(lowfd, F_CLOSEM, 0) != -1) {
+	return;
+    } else 
 #endif
     {
 	/*